:root {
  /* Ultra-modern Architecture Theme */
  --bg-dark: #030712;
  --bg-surface: #0a0f1e;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-indigo: #6366f1;
  --accent-emerald: #10b981;
  --accent-sky: #0ea5e9;
  --accent-red: #ef4444;

  --font-main: 'Inter', sans-serif;
  --font-display: 'Outfit', sans-serif;

  --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
  font-weight: 400;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.text-center {
  text-align: center;
}

/* Background Base */
.bg-gradient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  background: var(--bg-dark);
}

/* Aurora Background System */
.aurora-container {
  position: fixed;
  top: -20vh;
  left: 0;
  width: 100vw;
  height: 85vh;
  z-index: -1;
  pointer-events: none;
  mask-image: linear-gradient(to bottom, black 40%, transparent 95%);
  -webkit-mask-image: linear-gradient(to bottom, black 40%, transparent 95%);
  opacity: 1;
  filter: blur(55px);
}

.aurora-item {
  position: absolute;
  top: 0;
  width: 60vw;
  height: 100%;
  mix-blend-mode: screen;
  opacity: 0.6;
  border-radius: 50%;
}

.aurora-left {
  left: -20%;
  background: radial-gradient(ellipse at top, var(--accent-emerald), transparent 85%);
  animation: auroraDriftLeft 14s ease-in-out infinite alternate;
}

.aurora-center {
  left: 10%;
  background: radial-gradient(ellipse at top, var(--accent-indigo), transparent 85%);
  animation: auroraDriftCenter 18s ease-in-out infinite alternate-reverse;
}

.aurora-right {
  right: -20%;
  background: radial-gradient(ellipse at top, var(--accent-sky), transparent 85%);
  animation: auroraDriftRight 12s ease-in-out infinite alternate;
}

@keyframes auroraDriftLeft {
  0% {
    transform: translateX(0) scale(1) rotate(0deg);
    opacity: 0.5;
  }

  50% {
    transform: translateX(25vw) scale(1.6) rotate(8deg);
    opacity: 0.9;
  }

  100% {
    transform: translateX(-10vw) scale(1.2) rotate(-3deg);
    opacity: 0.6;
  }
}

@keyframes auroraDriftCenter {
  0% {
    transform: translateX(0) scale(1.3);
    opacity: 0.8;
  }

  50% {
    transform: translateX(-20vw) scale(1.8);
    opacity: 0.4;
  }

  100% {
    transform: translateX(15vw) scale(1.2);
    opacity: 1;
  }
}

@keyframes auroraDriftRight {
  0% {
    transform: translateX(0) scale(1) rotate(0deg);
    opacity: 0.6;
  }

  50% {
    transform: translateX(-30vw) scale(1.5) rotate(-6deg);
    opacity: 1;
  }

  100% {
    transform: translateX(10vw) scale(1.4) rotate(4deg);
    opacity: 0.7;
  }
}

/* Navigation */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(10px);
  /* Subtle blur for navigation only, not the main glass effect */
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--font-display);
  transition: var(--transition);
}

.logo:hover {
  opacity: 0.8;
  transform: translateY(-1px);
}

.logo-play {
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--font-display);
  margin-left: 0.5rem;
  padding-left: 0.75rem;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.logo-play span {
  color: var(--accent-red);
}

.logo-play:hover {
  opacity: 0.8;
  transform: translateY(-1px);
}

.back-to-top {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-10px);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.back-to-top:hover {
  background: var(--accent-indigo);
  border-color: var(--accent-indigo);
}

.back-to-home {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.back-to-home:hover {
  background: var(--accent-indigo);
  border-color: var(--accent-indigo);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 3rem;
}

.nav-links a {
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav-links a:hover {
  color: #fff;
}

.btn-primary {
  background: #fff;
  color: var(--bg-dark);
  padding: 0.75rem 1.5rem;
  border-radius: 2px;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn-primary:hover {
  background: var(--accent-indigo);
  color: #fff;
  transform: translateY(-2px);
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-main);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.lang-btn.active {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.lang-btn:hover:not(.active) {
  color: #fff;
}

.flag-icon {
  width: 14px;
  height: 10px;
  display: inline-block;
  border-radius: 1px;
}

.icon-en {
  background: #00247d;
  position: relative;
  overflow: hidden;
}

.icon-en::before {
  content: '';
  position: absolute;
  top: 0;
  left: 40%;
  width: 20%;
  height: 100%;
  background: #fff;
}

.icon-en::after {
  content: '';
  position: absolute;
  top: 40%;
  left: 0;
  width: 100%;
  height: 20%;
  background: #fff;
}

/* Red cross on top */
.icon-en-cross-h {
  position: absolute;
  top: 45%;
  left: 0;
  width: 100%;
  height: 10%;
  background: #cf142b;
  z-index: 1;
}

.icon-en-cross-v {
  position: absolute;
  left: 45%;
  top: 0;
  width: 10%;
  height: 100%;
  background: #cf142b;
  z-index: 1;
}

.icon-nl {
  background: linear-gradient(to bottom, #ae1c28 33.3%, #ffffff 33.3%, #ffffff 66.6%, #21468b 66.6%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.cta-group {
  display: flex;
  gap: 1.5rem;
  margin-top: 1rem;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
}

.hero-label {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--accent-indigo);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 1.1;
  margin-bottom: 2rem;
  background: linear-gradient(to bottom right, #fff 50%, rgba(255, 255, 255, 0.4));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 30px rgba(99, 102, 241, 0.2);
}

.hero-body {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 3rem;
  font-weight: 300;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 2rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  writing-mode: vertical-lr;
  animation: bounce 2s infinite;
}

@keyframes bounce {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(10px);
  }
}

/* Vision / Parallax Section */
.vision-container {
  position: relative;
  min-height: 800vh;
  background: var(--bg-dark);
}

.vision-visuals {
  position: sticky;
  top: 0;
  height: 100vh;
  width: 100%;
  overflow: hidden;
  z-index: 1;
}

.visual-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 15%;
  pointer-events: none;
}

.visual-layer.active {
  opacity: 1;
}

/* Individual Layer Visuals */
.layer-1::after {
  content: '';
  width: 300px;
  height: 300px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-top: 2px solid var(--accent-indigo);
  border-radius: 50%;
  animation: rotateLinear 10s linear infinite;
}

.layer-2::before {
  content: '';
  width: 300px;
  height: 150px;
  background: repeating-linear-gradient(90deg, transparent, transparent 40px, var(--accent-emerald) 40px, var(--accent-emerald) 42px);
  mask-image: linear-gradient(to right, transparent, black, transparent);
  animation: slideParallel 4s linear infinite;
}

/* Step 3: Layered Node Viz */
.node-viz {
  width: 400px;
  height: 400px;
  display: flex;
  flex-direction: column;
  gap: 40px;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
}

.node-layer {
  width: 200px;
  height: 60px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(99, 102, 241, 0.05);
  transform: rotateX(45deg);
  animation: layerFloat 4s ease-in-out infinite;
  display: flex;
  align-items: center;
  justify-content: center;
}

.node-layer::after {
  content: '';
  width: 6px;
  height: 6px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 0 10px #fff;
}

.layer-magui {
  animation-delay: 0s;
  border-color: var(--accent-indigo);
}

.layer-lux {
  animation-delay: -1s;
  border-color: var(--accent-emerald);
}

.layer-ops {
  animation-delay: -2s;
  border-color: var(--accent-sky);
}

.layer-3::after {
  content: '';
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1), transparent 70%);
  position: absolute;
  z-index: -1;
}

.layer-4::after {
  content: '';
  width: 220px;
  height: 220px;
  border: 1px dashed var(--accent-indigo);
  border-radius: 50%;
  animation: pulseRotate 8s linear infinite;
}

.layer-4::before {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border: 1px solid var(--accent-emerald);
  border-radius: 50%;
  opacity: 0.5;
  animation: corePulse 3s ease-in-out infinite;
}

@keyframes corePulse {

  0%,
  100% {
    transform: scale(0.8);
    opacity: 0.3;
  }

  50% {
    transform: scale(1.1);
    opacity: 0.6;
  }
}

.layer-5::before {
  content: '';
  width: 2px;
  height: 300px;
  background: linear-gradient(to bottom, var(--accent-indigo), transparent);
  animation: growVertical 4s ease-in-out infinite;
}

.layer-6::after {
  content: '';
  width: 150px;
  height: 150px;
  border: 1px solid #fff;
  transform: rotate(45deg);
  animation: formBox 5s ease-in-out infinite;
}

.layer-7 {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.layer-7 div {
  width: 60px;
  height: 60px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  animation: modulePop 4s ease-in-out infinite;
}

.layer-8::before {
  content: 'QN';
  font-family: var(--font-display);
  font-size: 8rem;
  font-weight: 700;
  color: #fff;
  opacity: 0.1;
  filter: blur(20px);
  animation: identityReveal 6s ease-in-out infinite;
}

/* Animations Core */
@keyframes rotateLinear {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@keyframes slideParallel {
  from {
    background-position: 0 0;
  }

  to {
    background-position: 84px 0;
  }
}

@keyframes layerFloat {

  0%,
  100% {
    transform: rotateX(45deg) translateY(0);
    opacity: 0.6;
  }

  50% {
    transform: rotateX(45deg) translateY(-20px);
    opacity: 1;
  }
}

@keyframes pulseRotate {

  0%,
  100% {
    transform: rotate(0deg) scale(0.8);
    opacity: 0.3;
  }

  50% {
    transform: rotate(180deg) scale(1.1);
    opacity: 0.8;
  }
}

@keyframes growVertical {

  0%,
  100% {
    height: 0;
    opacity: 0;
  }

  50% {
    height: 300px;
    opacity: 1;
  }
}

@keyframes formBox {
  0% {
    width: 0;
    height: 0;
    opacity: 0;
  }

  50% {
    width: 150px;
    height: 150px;
    opacity: 1;
  }

  100% {
    width: 150px;
    height: 150px;
    opacity: 0;
  }
}

@keyframes modulePop {

  0%,
  100% {
    transform: scale(0.8);
  }

  50% {
    transform: scale(1);
    border-color: var(--accent-emerald);
  }
}

@keyframes identityReveal {

  0%,
  100% {
    opacity: 0;
    filter: blur(20px);
  }

  50% {
    opacity: 0.5;
    filter: blur(0);
  }
}

/* Vision Content */
.vision-content {
  position: relative;
  z-index: 2;
}

.vision-step {
  height: 100vh;
  display: flex;
  align-items: center;
  padding: 0 10%;
}

.step-content {
  max-width: 600px;
  opacity: 0;
  transform: translateY(20px);
  transition: all 1s ease;
}

.vision-step.in-view .step-content {
  opacity: 1;
  transform: translateY(0);
}

.step-super {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-sky);
  margin-bottom: 1rem;
  font-weight: 600;
}

.vision-step h2 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.vision-step p {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 300;
}

.vision-step .tagline {
  margin-top: 2rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.1em;
}

/* Breadcrumbs */
.vision-breadcrumbs {
  position: fixed;
  right: 2rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.crumb {
  width: 12px;
  height: 1px;
  background: rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: var(--transition);
}

.crumb.active {
  width: 40px;
  background: var(--accent-indigo);
}

/* Operating Architecture */
.operating-architecture {
  padding: 12rem 0;
  background: var(--bg-dark);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.operating-architecture h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.4em;
  color: var(--accent-indigo);
  margin-bottom: 6rem;
}

.architecture-content {
  max-width: 900px;
  margin: 0 auto;
}

.architecture-content p {
  font-size: 1.15rem;
  color: #fff;
  line-height: 1.8;
  margin-bottom: 4rem;
  font-weight: 300;
  letter-spacing: 0.02em;
}

/* Command Stack */
.command-stack-section {
  padding: 12rem 0;
  background: var(--bg-dark);
}

.section-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.4em;
  color: var(--accent-indigo);
  text-align: center;
  margin-bottom: 8rem;
}

.stack-container {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

.stack-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.flow-dot-down {
  stroke: var(--accent-indigo);
  stroke-width: 1.5;
  stroke-dasharray: 4 6;
  animation: flowMoveDown 1s linear infinite;
  opacity: 0.8;
}

.flow-dot-up {
  stroke: var(--accent-emerald);
  stroke-width: 1.5;
  stroke-dasharray: 4 6;
  animation: flowMoveUp 1s linear infinite;
  opacity: 0.8;
}

@keyframes flowMoveDown {
  from {
    stroke-dashoffset: 20;
  }

  to {
    stroke-dashoffset: 0;
  }
}

@keyframes flowMoveUp {
  from {
    stroke-dashoffset: 40;
  }

  to {
    stroke-dashoffset: 0;
  }
}

.stack-layers {
  display: flex;
  flex-direction: column;
  gap: 80px;
  position: relative;
  z-index: 1;
}

.stack-layer {
  display: flex;
  justify-content: center;
  position: relative;
}

.node-group {
  display: flex;
  gap: 30px;
  justify-content: center;
  position: relative;
}

.node {
  background: #050a18;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.25rem;
  width: 260px;
  position: relative;
  cursor: default;
  transition: var(--transition);
}

.node:hover {
  border-color: var(--accent-indigo);
  background: #0a1122;
}

.node-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: #fff;
  margin-bottom: 0.25rem;
}

.node-subtitle {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Lateral Learning Loops */
.lateral-loop {
  position: absolute;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--accent-sky), var(--accent-sky) 2px, transparent 2px, transparent 6px);
  width: 100%;
  top: 50%;
  z-index: -1;
  opacity: 0.3;
}

.lux-loop {
  width: calc(100% + 60px);
}

.agent-loop {
  width: calc(100% + 60px);
}

/* Hover Panels */
.hover-panel {
  position: absolute;
  top: calc(100% + 15px);
  left: 0;
  width: 300px;
  background: #030712;
  border: 1px solid var(--accent-indigo);
  padding: 1.5rem;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
}

.node:hover .hover-panel {
  opacity: 1;
  visibility: visible;
}

.hover-panel p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.hover-panel strong {
  color: #fff;
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.hover-panel .authority {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--accent-emerald);
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
}

/* Spacer Section for Aurora Showcase */
.spacer-section {
  height: 40vh;
  background: transparent;
}

/* QN.Play Specific Styles */
.play-hero {
  padding: 12rem 0 6rem;
  text-align: center;
}

.play-grid-section {
  padding: 4rem 0 12rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.project-tile {
  background: var(--bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-tile:hover {
  transform: translateY(-5px);
  border-color: var(--accent-red);
  box-shadow: 0 10px 30px rgba(239, 68, 68, 0.1);
}

.tile-image {
  width: 100%;
  aspect-ratio: 16/9;
  background: #111827;
  position: relative;
  overflow: hidden;
}

.tile-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.project-tile:hover .tile-image img {
  transform: scale(1.05);
}

.tile-content {
  padding: 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.tile-category {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-red);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.tile-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: #fff;
}

.tile-description {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.tile-link {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
}

.tile-link svg {
  transition: transform 0.3s ease;
}

.project-tile:hover .tile-link svg {
  transform: translateX(4px);
}

@media (max-width: 768px) {
  .logo-group {
    gap: 0.5rem;
  }

  .logo-play {
    font-size: 1rem;
    padding-left: 0.5rem;
  }

  .logo {
    font-size: 1rem;
  }
}

/* Footer */
footer {
  padding: 4rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}